Having my own campground in skeeter country I know of several weapons you can employ against the little bloodsuckers.
There are plants which naturally repel mosquitoes. Citronella is the most well known but Horsemint, Marigolds, Ageratum and Catnip will also work. Plant them around the perimeter of your campsite especially between it and the swamp.
Another trick is to hang a dozen or so hurricane lanterns around the campsite. Not only will they provide light and look really cool at night but along with a campfire they also serve as decoy heat and carbon dioxide sources which skeeters will target instead of you. They act sort of like anti-radar chaff creating too many targets for them to concentrate on. To make them even more effective use citronella oil.
Then there are mosquito predators you can encourage to make your campsite their hunting grounds. Build Bat Boxes and hang them up in trees around the area. It's kind of a hit or miss whether bats will occupy them but they're cheap to build and if the bats do move in you'll notice a serious drop in mosquito numbers in a season or two.
You can also buy dragonfly eggs and larva and seed the swamp and surrounding areas but I've never tried that personally. I understand it works pretty good though as long as you get the right species. You might also be able to collect their larva from other local bodies of water and relocate them to your swamp boosting the regular population.
Finally there is an electric mosquito swatter for direct action:
http://www.amazon.com/BugKwikZap-Tra...ic+fly+swatter
Don't laugh these things work great and are enormously satisfying!
Now none of these methods are foolproof but used in combination they can make the mosquito problem at least manageable. The easiest solution though is to camp in the Fall when the skeeters are gone for the year!
